Red Knight (Welsh: Marchog Coch, Cornish: Marghek Rudh, Breton: Marc'heg Ruz) is a title borne by several characters in Arthurian legend.
The Red Knight prominently appears in the tales of the hero Perceval (Percival) as his early enemy.
Two different Red Knights appear in the tale of Gareth in Thomas Malory's Le Morte d'Arthur.